viewup

The plugin allow you to select a post type to be the products and a meta name to be the price. 
With shortcodes, you can add a ADD TO CART button and a CART PAGE. 
The plugin integrates with <code>contact form 7</code>, allowing you to insert on your contact form the user cart.

UP WP Cart

Simple cart plugin for WordPress, with Contact Form 7 integration

Nilambar Sharma

Are you frustrated by the lack of customization options in default Category widget in WordPress? Then this plugin is for you. Works in similar fashion but with several customization options. Cheers !

NS Category Widget

very nice plugin does what it says!

good job for dev!

Just what i needed

A plugin to add widget for listing Categories and Taxonomies. Extending Default WordPress Category Widget.

UP WP Cart vs NS Category Widget